IFMEDIA(4) OpenBSD Programmer's Manual IFMEDIA(4)NAMEifmedia - network interface media settings
SYNOPSIS
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_media.h>
DESCRIPTION
The ifmedia interface provides a consistent method for querying and
setting network interface media and media options. The media is
typically set using the ifconfig(8) command.
Currently these link types are supported by ifmedia:
IFM_ETHER Ethernet
IFM_FDDI FDDI
IFM_IEEE80211 IEEE802.11 Wireless LAN
IFM_TDM Time Division Multiplex
IFM_CARP CARP
The following sections describe the possible media settings for each link
type. Not all of these are supported by every device; refer to your
device's manual page for more information.
The lists below provide the possible names of each media type or option.
The first name in the list is the canonical name of the media type or
option. Additional names are acceptable aliases for the media type or
option.
COMMON MEDIA TYPES AND OPTIONS
The following media types are shared by all link types:
IFM_AUTO Autoselect the best media. [autoselect, auto]
IFM_MANUAL Jumper or switch on device selects media. [manual]
IFM_NONE Deselect all media. [none]
The following media options are shared by all link types:
IFM_FDX Place the device into full-duplex mode. This option
only has meaning if the device is normally not full-
duplex.
IFM_HDX Place the device into half-duplex mode. This option
only has meaning if the device is normally not half-
duplex. [half-duplex, hdx]
IFM_FLOW Enable hardware flow control on device.
IFM_FLAG0 Driver-defined flag. [flag0]
IFM_FLAG1 Driver-defined flag. [flag1]
IFM_FLAG2 Driver-defined flag. [flag2]
IFM_LOOP Place the device into hardware loopback mode.
[loopback, hw-loopback, loop]
MEDIA TYPES AND OPTIONS FOR ETHERNET
The following media types are defined for Ethernet:
IFM_10_T 10BASE-T, 10Mb/s over unshielded twisted pair, RJ45
connector. [10baseT, UTP, 10UTP]
IFM_10_2 10BASE2, 10Mb/s over coaxial cable, BNC connector;
also called Thinnet. [10base2, BNC, 10BNC]
IFM_10_5 10BASE5, 10Mb/s over 15-wire cables, DB15
connector; also called AUI. [10base5, AUI, 10AUI]
IFM_10_STP 10BASE-STP, 10Mb/s over shielded twisted pair, DB9
connector. [10baseSTP, STP, 10STP]
IFM_10_FL 10BASE-FL, 10Mb/s over fiber optic cables.
[10baseFL, FL, 10FL]
IFM_100_TX 100BASE-TX, 100Mb/s over unshielded twisted pair,
RJ45 connector. [100baseTX, 100TX]
IFM_100_FX 100BASE-FX, 100Mb/s over fiber optic cables.
[100baseFX, 100FX]
IFM_100_T4 100BASE-T4, 100Mb/s over 4-wire (category 3)
unshielded twisted pair, RJ45 connector.
[100baseT4, 100T4]
IFM_100_T2 100BASE-T2. [100baseT2, 100T2]
IFM_100_VG 100VG-AnyLAN. [100baseVG, 100VG]
IFM_1000_SX 1000BASE-SX, 1Gb/s over multi-mode fiber optic
cables. [1000baseSX, 1000SX]
IFM_1000_LX 1000BASE-LX, 1Gb/s over single-mode fiber optic
cables. [1000baseLX, 1000LX]
IFM_1000_CX 1000BASE-CX, 1Gb/s over shielded twisted pair.
[1000baseCX, 1000CX]
IFM_1000_T 1000BASE-T, 1Gb/s over category 5 unshielded
twisted pair, RJ45 connector. [1000baseT, 1000T]
IFM_1000_TX Compatibility for 1000BASE-T. [1000baseTX, 1000TX]
IFM_2500_SX 2500BASE-SX, 2.5Gb/s over multi-mode fiber optic
cables. [2500baseSX, 2500SX]
IFM_10G_CX4 10GBASE-CX4, 10Gb/s over XAUI 4-lane PCS and copper
cables. [10GbaseCX4, 10GCX4, 10GBASE-CX4]
IFM_10G_LR 10GBASE-LR, 10Gb/s over single-mode fiber optic
cables. [10GbaseLR, 10GLR, 10GBASE-LR]
IFM_10G_SFP_CU 10GSFP+Cu, 10Gb/s over SFP+ Direct Attach cables.
[10GSFP+Cu, 10GCu]
IFM_10G_SR 10GBASE-SR, 10Gb/s over multi-mode fiber optic
cables. [10GbaseSR, 10GSR, 10GBASE-SR]
IFM_10G_T 10GBASE-T, 10Gb/s over unshielded twisted pair,
RJ45 connector. [10GbaseT, 10GT, 10GBASE-T]
IFM_HPNA_1 HomePNA 1.0, 1Mb/s over 2-wire (category 3)
unshielded twisted pair [HomePNA1, HPNA1]
The following media options are defined for Ethernet:
IFM_ETH_MASTER Configure a 1000BASE-T PHY as a MASTER PHY.
IFM_ETH_RXPAUSE Receive flow control is enabled on the 1000BASE-T
PHY.
IFM_ETH_TXPAUSE Transmit flow control is enabled on the 1000BASE-T
PHY.
MEDIA TYPES AND OPTIONS FOR FDDI
The following media types are defined for FDDI:
IFM_FDDI_SMF Single-mode fiber. [Single-mode, SMF]
IFM_FDDI_MMF Multi-mode fiber. [Multi-mode, MMF]
IFM_FDDI_UTP Unshielded twisted pair, RJ45 connector. [UTP, CDDI]
The following media options are defined for FDDI:
IFM_FDDI_DA Dual-attached station vs. Single-attached station.
[dual-attach, das]
MEDIA TYPES AND OPTIONS FOR IEEE802.11 WIRELESS LAN
The following media types are defined for IEEE802.11 Wireless LAN:
IFM_IEEE80211_FH1 Frequency Hopping 1Mbps. [FH1]
IFM_IEEE80211_FH2 Frequency Hopping 2Mbps. [FH2]
IFM_IEEE80211_DS1 Direct Sequence 1Mbps. [DS1]
IFM_IEEE80211_DS2 Direct Sequence 2Mbps. [DS2]
IFM_IEEE80211_DS5 Direct Sequence 5.5Mbps. [DS5]
IFM_IEEE80211_DS11 Direct Sequence 11Mbps. [DS11]
IFM_IEEE80211_DS22 Direct Sequence 22Mbps. [DS22]
IFM_IEEE80211_OFDM6 Orthogonal Frequency Division Multiplexing
(OFDM) 6Mbps. [OFDM6]
IFM_IEEE80211_OFDM9 OFDM 9Mbps. [OFDM9]
IFM_IEEE80211_OFDM12 OFDM 12Mbps. [OFDM12]
IFM_IEEE80211_OFDM18 OFDM 18Mbps. [OFDM18]
IFM_IEEE80211_OFDM24 OFDM 24Mbps. [OFDM24]
IFM_IEEE80211_OFDM36 OFDM 36Mbps. [OFDM36]
IFM_IEEE80211_OFDM48 OFDM 48Mbps. [OFDM48]
IFM_IEEE80211_OFDM54 OFDM 54Mbps. [OFDM54]
IFM_IEEE80211_OFDM72 OFDM 72Mbps. [OFDM72]
The following media options are defined for IEEE802.11 Wireless LAN:
IFM_IEEE80211_ADHOC Ad-hoc mode. [adhoc]
IFM_IEEE80211_HOSTAP Host Access Point mode. [hostap]
IFM_IEEE80211_IBSS IBSS mode. [ibss]
IFM_IEEE80211_IBSSMASTER IBSS master mode. [ibssmaster]
IFM_IEEE80211_MONITOR Monitor mode. [monitor]
IFM_IEEE80211_TURBO Turbo mode. [turbo]
The following media modes are defined for IEEE802.11 Wireless LAN:
IFM_IEEE80211_11A 5Ghz, OFDM mode. [11a]
IFM_IEEE80211_11B 2GHz, Direct Sequence mode. [11b]
IFM_IEEE80211_11G 2GHz, CCK mode. [11g]
IFM_IEEE80211_FH 2GHz, GFSK mode. [fh]
The channels detailed below are defined for IEEE802.11 Wireless LAN. The
list of available frequencies is dependent on radio regulations specified
by regional authorities. Recognized regulatory authorities include the
FCC (United States), ETSI (Europe), France, and Japan. Frequencies in
the table are specified in MHz.
Channel FCC ETSI France Japan
1 2412 2412 - 2412
2 2417 2417 - 2417
3 2422 2422 - 2422
4 2427 2427 - 2427
5 2432 2432 - 2432
6 2437 2437 - 2437
7 2442 2442 - 2442
8 2447 2447 - 2447
9 2452 2452 - 2452
10 2457 2457 2457 2457
11 2462 2462 2462 2462
12 - 2467 2467 2467
13 - 2472 2472 2472
14 - - - 2484
Note that the channels do overlap; the bandwidth required for each
channel is about 20MHz. When using multiple channels in close proximity
it is suggested that channels be separated by at least 25MHz. In the US,
this means that only channels 1, 6, and 11 may be used simultaneously
without interference.
MEDIA TYPES AND OPTIONS FOR TDM
The following media types are defined for TDM:
IFM_TDM_E1 E1, 2048kb/s HDB3 encoded, G.703 clearchannel
serial line. [e1]
IFM_TDM_E1_AMI E1, 2048kb/s AMI encoded, G.703 clearchannel
serial line. [e1-ami]
IFM_TDM_E1_AMI_G704 E1, 2048kb/s AMI encoded, G.704 structured
serial line. [e1-ami-g.704]
IFM_TDM_E1_G704 E1, 2048kb/s HDB3 encoded, G.704 structured
serial line. [e1-g.704]
IFM_TDM_E1_G704_CRC4 E1, 2048kb/s HDB3 encoded, G.704 structured
serial line with CRC4 checksum. [e1-g.704-
crc4]
IFM_TDM_E3 E3, 34368kb/s HDB3 encoded, G.703
clearchannel serial line. [e3]
IFM_TDM_E3_G751 E3, 34368kb/s HDB3 encoded, G.751 structured
serial line. [e3-g.751]
IFM_TDM_E3_G832 E3, 34368kb/s HDB3 encoded, G.832 structured
serial line. [e3-g.832]
IFM_TDM_T1 T1, 1536xkb/s B8ZS encoded, extended super
frame (ESF) structured serial line. [t1]
IFM_TDM_T1_AMI T1, 1536kb/s AMI encoded, super frame (SF)
structured serial line. [t1-ami]
IFM_TDM_T3 T3, 44736kb/s B3ZS, C-bit structured serial
line. [t3]
IFM_TDM_T3_M13 T3, 44736kb/s B3ZS, M13 structured serial
line. [t3-m13]
The following media options are defined for TDM:
IFM_TDM_HDLC_CRC16 Cisco HDLC with 16-bit CRC checksum encoding.
[hdlc-crc16]
IFM_TDM_FR_ANSI ANSI/ITU Framerelay encoding. [framerelay-
ansi, framerelay-itu]
IFM_TDM_FR_CISCO Cisco Framerelay encoding. [framerelay-cisco]
IFM_TDM_PPP PPP encoding. [ppp]
By default TDM interfaces will use Cisco HDLC encoding with a 32-bit CRC
checksum.
The following media modes are defined for TDM:
IFM_TDM_MASTER Use local clock source as master clock. [master]
MEDIA TYPES AND OPTIONS FOR CARPcarp(4) does not support any media types or options.
SEE ALSOnetintro(4), ifconfig(8)HISTORY
The ifmedia interface first appeared in BSD/OS 3.0. The implementation
that appeared in NetBSD 1.3 was written by Jonathan Stone and Jason R.
Thorpe to be compatible with the BSDI API. It has since gone through
several revisions which have extended the API while maintaining backwards
compatibility with the original API.
Support for the IEEE802.11 Wireless LAN link type was added in
NetBSD 1.5.
Host AP mode was added in OpenBSD 3.1.
OpenBSD 4.9 February 9, 2010 OpenBSD 4.9